Notes: - Beginning with 1965, all volumes are shown on a pressure base of 14.73 p.s.i.a. at 60- F. Forprior years, the pressure base was 14.65 p.s.i.a. at 60- F. - Totals may not equal sum of components dueto independent rounding.

2Depleted fields, aquifers, and other types of storage not using salt formations.